Question

What is the domain and range of `f(x)=1/2(x-2)`?

Answer 1

`x inRR;f(x)in[-oo,oo]`

Explanation:

All values of `x` can be put into `f(x)` without getting more than 1 `y` value for 1 `x` value, or getting undefined.

Therefore `x in RR` (meaning all real numbers can be used in `f(x)`.

And since the graph is a straight line with a constant gradient, `f(x)` will gives all real values from negative infinity to positive infinity: `f(x)in[-oo,oo]` (meaning `f(x)` is in the range of and including negative infinity to positive infinity)